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Inversion Velocity Analysis - The Importance of Regularisation
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 77th EAGE Conference and Exhibition - Workshops, Jun 2015, Volume 2015, p.1 - 5
Abstract
Summary
Inversion Velocity Analysis has been recently proposed as an alternative to Migration Velocity Analysis. Under the Born approximation, it consists of first determining the optimal reflectivity model such that the synthetic data set nicely fits with the observed data set. Then, a standard velocity analysis is applied to the inverted reflectivity. The main differences with respect to the classical approach is the use of iterative migration versus standard migration. We propose here an alternative way to compute the gradient of the objective function and demonstrate the importance of the regularisation term introduced to determine the optimal reflectivity model.
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